Lock



May 21, 1935.

E. w. NORTH LOCK Filed April 23, 1951 r 4 SheetsSheet May 21, 1935. E. w. NORTH LOCK I Filed April 23, 1931 4. Sheets-Sheet 2 E, W. NORTH May 21, 1935.

LOCK

Filed April. 23, 1931 4 Sheets-Sheet 3 MfMYQ/M May 21, 1935. E. w. NORTH 2,002,453

LOCK

Filed April 23, 1931 4 Sheets-Sheet 4 Jaz- J60 .13 2

JZZ-

1720672250? Edwin WJWOrfib Patented May 21, 1935 LOCK a Edwin, w. North, Rockford, 111., designer to National Lock 00., Rockford, Ill., a corporation of Delaware e f Application April 23. 1931, Serial No. 532,149

V e e ,.13 Claims. (Cl. "iii-53) V This invention relates to locks and more espeinFigs. lto 22 inclusive, while lockB and its parts cially to combination locks of a type suitable for are shown in Figs. 23 to 41. Y

use as drawer locks, door locks, etc., and which Fig.1isa front elevation of look A. can be merchandised as hardware. l l Fig. 2 is a side elevation thereof.

Among other objects the invention aims to pro- Fig. 3 is a vertical section thereof taken lon- 5 vide a practicable and eificient lock controllable g tudi y of the" dial axis. both by permutation means and by a key. Fig. 4 is a cross section on the line 44-of Fig.

School furniture having drawers or lockers as 3, looking in the direction of the arrows.

signed to individual pupils should be equipped with 1 Fig. 5 is a sectional elevation, the section being locks of the combination type, so as to obviate the taken on the line 5-5 of Fig. 3, looking in the 10 inconveniences incident to the use of keys and the direction of the arrows. frequent losing of keys by pupils. On the other Fig. 6 shows a special key for use in changing hand, it is desirable that all looks in a school the lock combination. building or a given division thereof should be Fig. 7 shows a. master key for use in operating under the control of a key in possession of the a series of locks of the construction of lock A, but 5' schoolmaster, in order that the school authorihaving different lock combinations. ties may have quick access to all locked drawers Fig. 8 is an enlarged sectional detail view showand compartments for inspection. Again it is deing a means employed in connectionwith chang sirable that the locks should be ofsuch character ing the lock combination. a

as to permit changing their combinations, so that Fig. 9 is a sectional elevation taken on the hne 20 when a drawer or compartment previously used by 9-9 of Fig. 3, looking in thedirection of the arone pupil is re-assigned to another it may be under rows. I the control of a new combination known'only to Figs. 10 to 22 are detailviews of various parts,

the occupant and the school authorities. shown in perspective or in elevation.

From the foregoing it will be understoodthat F g. 10 is a lock bolt. 25

the application of the principle of master key con- Fig. 11 is aso-called index finger.

trol to locks of the combination typefor use in Fig. 12 is a so-called floating member. schools, and the incorporation of that principle in Fig. 13 is the first of a set of permutation disks. a construction of efficient character, and one Fig. 14 is anotherof said permutation disks.

which will permit adjustment by an authorized Fig. 15 is a small washer element used in co 30 person to change the combination of the look, but ec ion w t a Spring which actua es the nd which will not be susceptible of such change by: 'fi nger. the pupil to whom the lock is assigned, are desid Fig. 16 is the so-called key post. erata whichhave been in mind in evolving the Fig. 17 isa pickup ring with which the perpresent invention. mutation disk of Fig. 14 is equipped. 35

Also this invention has beendesigned with a 15 q washer.

view to producing a lock structure'of practicable F gs. '19 and 20are endand side elevations redesign from the standpoint of manufacture, and spectively of a positioning member in thelock with a view to producing a construction suitable case. l Y I 3 l for application to wooden doors, drawers, etc. in s. 1 and 22 are look tumblers. 40 the same manner as ordinary locks merchandised gs- 23 r 24 are Sideand from elevation as hardware are applied, i. e. by mortising the of k lock in the back of the wooden door ordoor front. 25 1s vertlcal. central longltudmal Two illustrative embodiments of the invention fl gffl 1 r r are Shown in the accompanying drawings For Fig. 1s a sec iona elevation taken on the convenience these will be referred to herein as line 26-46 of jm in h direction of the arrows. lock A and lock B. These two illustrative locks Fig; 27 is the keypost of lock B.

are similar in fundamentals but embody specifi- Fig 28 is thelmaster key threfbn Cally different features of lmprovement- Fig. 29 is a sectional elevationtaken on the line 50 It will be understood that the specific construc- "4295 l25= looking. in h direction of the tion embodied in each lock is exemplary, and that arrows 1 the details and arrangement of construction may Figs. 30 to 41 are detail views principally in be variously modified. v f perspective; I, In the drawings, look A and its parts are shown Fig. 30 is the lock bolt of lock B. i

, of the index finger I-I Fig. Fig. Fig.

ing.

Fig. Fig. F

31 is its index finger. 32 is the accompanying floating member. 33 is a frame member in the lock hous- Look A Referring first to Figs. l'to 22 inclusive, the specific construction embodied in illustrative look A is described as follows: 1 r 1 v The lock housing comprises the'flanged back plate I and the front housing member 2 having the protruding cylindrical part 3. i

Fitted to the protrusion 3 is the rotatable dial member 4, which as shown in Fig. 2 may bear a figured dial to be adjusted with reference to an index or pointer at 6. V

The dial member 4 and'its operating knob 5 are carried on a rotatable sleeve 1 hereinafter referred to as the dial sleeve.

The dial sleeve is rotatably fitted on an inner sleeve 8 extending from a fixed frame plate 9 in the lock housing. j I

Slidable in the lock housing is. the lock bolt I carrying the index finger IIpivoted thereto at Il a Associated with the lock bolt III is a so-called floating member I2 whichis movable with the lock bolt It! in the key-controlledoperation of the lock.

A set of permutation manipulatable by the dial knob, are indicated at I3, I4, I5, the first disk, I3 being affixed to thedia-l sleeve I, and the other disks I 4 and I being r'otatably mounted on theinnler sleeve 8. 1 I

A set of lock tumblers are indicated .at IE, IT, I8.

Rotatable within the inner sleeve 8 is the longitudinally slotted key postIS which when the proper key is inserted canbe utilized for operating the lock. I

The lock bolt II] is operable bythe dial knob through the permutation disks and the index finger after working the lock combination or manipulating the disks to a relationship to permit the actuation of the lock bolt. ,The lock bolt I0 is also operable by the key through the key post and the supplemental or floating'member I2. In the operation :ofthe lock by the key, the lock bolt I0 and the floating member I2 move as a unit, while in the operation by the dial knob, the lock bolt I8 moves independently or slides relative to the associated floating member.

As shown in Fig. 10, the lock bolt I0 comprises a head and shank. The head is shown as a laminated body in Fig. 3'. In the locked position of the lock bolt, the head of the bolt protrudes through an opening therefor .the back plate flange I for engagement in a keeper 3 opening (not shown) of the drawer casing or door jamb for the draweror door with which the lock is used.

Referring to Fig. 10 a recess III in the head of the lock bolt accommodates the pivoted end Another recess Ill in the lock bolt head is provided to clear an elementv of the floating member; hereinafter referred tov as the fence, which element is shown at I12 in Fig.12. I The lock bolt shank is longitudinally slotted at ill to receive a stud I2 on-the floating member, and is longitudinally slotted at In to accommodate a fixed guide pin (Fig. 5).

As shown in Fig. 12, the floating member I2 is formed with an opening recessed at I2 for operative engagement by the arm It of the key post I9 (Figs. 5 and 16). A projection I2 on the floating member functions as a guide and thrust abutment for the index finger I I as hereinafter explained. The stud I2 on the floating member passes through the slot m of the lock bolt III. In the locked position, the stud I2 is at the rear end of the slot I0 1. e. at the bottom end of said slot as the construction is viewed in the drawings.

The floating member I2 is provided with 1ongitudinal slots I2 which receive the fixed guide pins 20. A so-called fence I2 provided by a projection or shoulder on the floating member, cooperates with the lock tumblers, as hereinafter explained, to prevent movement of the floating member except when key-actuated by the requisite key for that purpose.

As shown in Figs. 3 and 5, the lock bolt I9 and floating member I2 are arranged between the back wall of the lock case and the frame plate 9, the floating member I2 being in the rear. One of the two guide pins 20 engaged by the guide slots I2 of the floating member is also engaged by the guide slot III of the lock bolt I ll. Itwill be understood that the lock bolt II) is guided for sliding movement between the floating member I2 and the frame plate 9 and by the sliding of its head in the slot therefor in the back plate flange I and the engagement of the slotted shank with one of the guide pins 2%; and that the fioating member I2 is guided for sliding movement between the lock bolt II] and the back wall of the lock housing and by engagement of its guide slots I2 with the pins 20.

As shown in Figs. 5 and 9, a wire spring 2I is coiled about a fixed stud or post 22 adjacent to one of the guide pins 29. The short end of this spring bears againstthe adjacent pin 2B, and' the long end of the spring bears against the index finger I I and presses the index finger inwardly or toward the axis of the permutation disks.

Said index finger I I is formed with a projection Il adapted to engage notches in the peripheries on the permutation disks when the latter are manipulated to register their notches with said I projection. Said projection II is also adapted to co-act with the projection I2 on the floating member as hereinafter explained. As shown in Fig. 11, the projection II of the index finger is grooved at I I for engagement by the spring 2 I Referring to the permutation disks, it will be understood that these disks are adapted to pick up one another when the dial knob 5 is rotated, and that by rotating the dial knob in opposite directions, as required to work the combination for which the lock is set to operate, the disks will be adjusted to a relationship whereby their peripheral notches will be in registration and in position to receivethe lug I I? of the index finger II.

The first disk I 3, aflixed on the inner end of the dial sleeve I, is shown separably in Fig. 13. Its peripheral notch is indicated at Is this notch having a beveled end I3 The projection I3 on this disk is to pick up the next disk.

In Fig. 3, the disks i4 and I5 are shown as thin perforated rings, and are respectively equipped with adjustable abutments provided by the associated rings Id and I5 Each disk I4 or land its associated abutment ring HI or Ifi may be considered as a unit. Fig. '14 shows the disk I4.

having the peripheral notch I 4* and the annular series of perforations I I. Fig. 17 shows its abutment ring M having an arm M bent to provide an abutment I I and having a terminal i to enter and project through one of theperforations It so as to provide'an" abutment at the opposite side of the disk I4. a r

The illustration of the disk I4 and its associated abutment ring I4 in Figs.'l3 and i6, is likewise illustrative of the next disk 15 and its associated ring I5 i i Referring to Fig. 3, it willbe apparent that the first disk I3.by its projection 13 (Fig. 13) will coact with the next ring I I through its abutment ring M the part I4 of which (Fig. 1'?) will be in the path of rotation of I 3; also that the terminal I 4 of M protruding through the disk I4 will provide an abutment which in its rotation will engage the abutment ring I5 of the disk I5.

. In Fig. 3, spacing washers between the disks are indicated at 23. One of these washers is shown in Fig. 18. Itis held non-rotatable by engagement of its lug 23 in a longitudinal groove 8 in the sleeve 8, which groove 8 is shown in Figs. 9 and 19.

The described construction of the permutation mechanism is exemplary of one appropriate construction of permutation disks adapted for manufacture as metal stampings and suitable for compact assemblage in a small lock construction and of such character as to permit different working combinations for different locks of the same construction, the combination depending upon the angular relationships of the abutment rings M and I5 to the peripheral notches ofthe respective disks I4 and I5. The manufacturer may put out as many different locks of identical construction, each operable with a different look combination, as the number of changes which can be made in the relationship of the disk I4 and its abutment ring I, multiplied by the number of changes which can be made in the angular relationship of the disk'I5 and its abutment ring I5=-. As each disk I4 and I5 has in this instance twenty-two different perforationsfor engagement by its abutment ring, it follows that there may be four hundred and eighty four different look combinations for this particularlock, determined by the relationship of the abutment rings to their respective disks. The number of permissible combinations may be multiplied by the use in different locks of first disks I3 having their lugs I3 at diiferent positions relative to the notch I3. Also, after any given lock is assembled, its combination may be changed by a dial adjustment as hereinafter explained.

In the specific look A, a predetermined rotation of the dial knob 5 in a counterclockwise direction will cause the setting of the disk I5 for the unlocking or releasing operation; a predetermined reverse rotation will cause the corresponding setting of the disk I4; and predeter mined rotation of the knob in the counterclockwise direction will set the first disk I3, whereupon all the disks will have their peripheral notches in registration to receive the lug II of the index finger II as indicated in Fig. 9.

The disks having been thus manipulated to position for registering their notches, the springpressed index finger II will snap intoengagement with the notches. This position of the index finger is shown in Fig. 9. Now by a continued rotation of the dial knob in the counterclockwise direction, the lock bolt III will be retracted from looking position by the index finger. .In other words, the lock bolt will be drawn back or down through the index finger by the backward pull exerted by the disks, and especially the first disk I3.

Inthe retraction of the lock bolt IEI by the dial knob, the floating member I2 remains stationary, being held from retraction by coaction of its fence I2 with one or more of the lock tumblers I6, II, I8, as hereinafter'explained.

. So the lock bolt II] when dial operated moves independently of the associated floating .mem--. her. The movement is limited by the stud I2 which will engage the head of the lock bolt 19 at the limit of its retracting movement. In this movement, the index finger is carried backward or downwardly past the projection I2 on the floating member, as will be apparent from Fig.9. The spring 2| bears slidably against the index finger during this movement, and the projection I2 ,on the floating member functions as a guide to prevent any outward movement 01 the index finger such as to disengage it from the disk notches.

To insure engagement of the index finger with the disk notches when brought into registration with H, and when the dial knob is rotated to effect the unlocking operation or retraction of the lock bolt ID, the projection I2 on the floating member is shown having a beveled edge, indicated at I2 in Fig. 11, for coaction with II to cam it inwardly. This is forthe following reason. In the locked condition'of the mechanism, the lug II bears. against or confronts the projection I2 as shown in Fig. 5. Now under certain conditions of use, there might be a back thrust or pressure on the lock bolt I0 which would create such a pressure between II and Ifi as to prevent the spring 2| from throwing in the index finger, if the said parts and I2 were of such form as to allow binding of the index finger. Therefore, to obviate possibility of such a mishap, the surface I2 of I 2* engaging the lug II is beveled as shown, so that, after the disk notches have been brought into registration with N and if there should be any thrust of II against I 2 due to back pressure on the lock bolt, the camming action of I2 against II will assist the spring in throwing the index finger into engagement with the disk notches.

The lock bolt I0, having been retracted by operation'of the dial knob as heretofore explained, may be protracted or returned to the locking position by a reverse turn of the dial knob. In this operation, the permutation disks rotating in the clockwise direction'force the lock bolt forward or up through the thrust communicated through the index finger. By the time the lock bolt reaches its locking position, i. e. the position shown in the drawings, the beveled end l3? of the notch of the first disk I3 (Fig. 13) engages the lug II ofthe index finger, and by its camming action throws out the index finger. Then the continued rotation of thedial knob will carry the disk I3 out of registration with the others, thus disestablishingthe relationship necessary to permit unlocking.

Reference will now be made to key control of the lock. As before stated, the lock bolt I0 may be actuated by means of a key through the medium of the rotatable key post I9 and the floating member I2. This operation involves a control by the key tumblers IE, IT, I8 to permit retraction of the floating member I2.

As shown in Fig. 5, the floating member I2 is normally prevented from retraction by the fact that certain of the tumblers would oppose movement of the fence .i2 In order to permit retraction; of the floating member, the tumblers must be adjusted so as to permit the fence 2 to enter-the slots of all the tumblers. In the specific construction shown in this instance, the tumblers I6 and i! are constructed to coact with the fence I2 these tumblers being normally held by the springs 24 in position to obstruct movement of the fence; while the rearmost tumbler I8 (shown in Fig. 21) is a master key tumblerof such form as never to interfere with the movement of the fence. This master key tumbler l8 has the lateral lug it overlying the other tumblers as shown in Fig. 5, so that by swinging the tumbler 18 to the right the tumblers l6 and I! will move with it, thus bringing the tumblers to such position that the fence I2 can move into the slots of the three tumblers, and accordingly permitting retraction of thefloating member.

A suitable key is shown at 25 in Fig. '7. This may be a special key for the particular look, but in this instance it is represented as a master key for operating a number of such locks.

As shown in Figs. 4, 5 and 16, the rotatable key post I9 is longitudinally slotted to receive the key. When the master key 25 is inserted into the key post and pushed back as far as it will go, the key post may be turned to the right (as viewed in Fig. 5), thereby bringing the arm Id of the key post into the recessed part l2 of the floating member. In this movement, the bit 25 of the master key will coact with the master key tumbler it to 1 swing it and the other tumblers into aligned'position to release the floating member. The continued turning of the key will cause the key post arm w to coact with the portion 12 (Fig. 12) of the floating member, thereby retracting the floating member and with it retracting the main lock bolt i0.

This retraction of the lock bolt Iii by the floating member i2 is due to the engagement of the stud l2 in the rear end of the slot lll In this retracting movement, theindex finger H moves with the lock bolt it) and floating member I2 as a unit, the index finger being above the guide and stop projection 62 of the floating member.

For locking or protracting the'lock bolt lit, the key is turned in the reverse direction, thereby pushing up the floating member l2 to its normal position, and this return movement of the floating member is transmitted to the lock bolt i through the projection l2 and the index finger In other words, as the floating member is pushed up or forward, its projection l2 acting through the index finger i i pushes the lock bolt it to protracted or locked position. In this action there can be no disengagement between the projection !2 and the index finger, since the lug N of the index finger isconflned between the peripheries of the permutation disks and the inner wall of the circular portion of the lock case.

Thus it will be seen that the lock may be operated for unlocking and locking either by manipulation of the dial, or by use of the proper key, preferably a master key. Briefly summarizing, the dial operation is effect-ed by manipulating the dial to work the required combination for releasing the locking mechanism, whereby the permutation disks are brought with their notches in registration in the positions shown in Fig. 9, and

the notches of the disks are then engaged by the lug ll of the index finger ll pivotally attached to the lock bolt I 0. Then by continuing the rotation of the dial knob in the same direction in which it, was last turned for working the combination (in this instance in a counterclockwise direction), the corresponding counterclockwise rotation of the disks will pull back the lock bolt through the connection provided by the index finger H. Then for locking, the dial knob is rotated reversely or in a clockwise direction so as to protract the lock bolt, and after reaching the protractedor locked position as shown in Fig. 9 a continued clockwise rotation of the dial knob will cause the beveled surface I3 of the notch in the first permutation disk It to exert a cam action against the lug li of the index finger, thus throwing out the index finger from engagement with the permutation disks, and disestablishing the operative combination for unlocking.

In the key operation, the proper key is inserted in the rotatable key post l9, and the key post is turned by the key, which has adjusted the tumblers to release the floating member; and in this turning of the key post the floating member is retracted, thereby drawing back the lock bolt through the connection at I2. The index finger H positioned as shown in Fig. 5 moves with the lock bolt in and floating member I 2, and when the key is turned in the reverse direction to advance or shove up the floating member, it pushes up the index finger by the projection I 2" and thereby pushes up or forward the lock bolt to the protracted position shown.

In connection with the key operation, attention is called to the fact that when the rotatable key post !9 is the neutral position shown in Fig. 5, the slot is in the front end or head of the key post will register with a notch 8 in the front end flange of the inner sleeve 8 (Figs. 3, l6 and 19). The key 25 is intended to be of such dimension that it cannot be inserted except when 19 registers with 8'. This gives the advantage that the key cannot be withdrawn except when 8 and W are in registration, or in other words, after unlocking the look by means of the key, the key cannot be withdrawn until the lock is again locked. This insures that the school inspector or other person who unlocks the look by means of the master key, will leave the lock in operative condition for working by the combination dial.

To permit the school authorities or an authorized person to change the lock combination, the lock embodies a concealed means adapted to be manipulatedby means of another special key indicated at 26 in Fig. 6. The means referred to is shownin Figs. 3 and 8. As shown in these figures, the dial member 4, instead of being formed integrally with the dial knob 5, is keyed to the dial sleeve 1 by means of a square pin or detent 2'1. This detent 2? slides in a slot 7 in the dial sleeve, and the detenti's spring-pressed into engagement with one of a series of notches 4 in the back face of the dial. As shown, the detent is urged forward by the spring 28 associated with an abutment element 29 engaging thedial sleeve at the rear end of the slot '5". The slot l in the dial sleeve is in registration with a slot 8 in the inner sleeve 8. The special key 25 may be inserted into the key post l9, and when the cam surface 26 engages the bottom in the slot la (Fig. 16) the projection 26 of the key will pass up through the slots 8 and l and engage the detent 21, so that the detent can be pushed backward by the key, thereby disengaging the detent from the rotatable dial member 4. The dial member 4 may then be rotated relative to: the dial knob,5 until another notch! is inregistration with the detent.

Thus the dial member 4,instead of being integral with the dial knob, is adjustable thereon to permit an independent rotation of the dial member for adjusting it relative to the first permutation disk I3, thereby changing the combination; the means for this purpose being entirely concealed and manipulatable only by the special key of Fig. 6. The notches 4 in the back face of the dial member are arranged at uniform intervals, say at every fifth point of the dial. An adjustment of the dial member by rotation in a clockwise direction to change the notch engaged by the detent 21 to the next notch, would result in a corresponding change of five pointsin the subsequent" working of the dial to work the look combination. 1

For adjusting the dial to change the lock COIII'. bination, it is necessary that the dial first be brought to a certain position in reference to the index orpointer 6, and that thereafter the dial knob 5 be maintained exactly in that position during the subsequent adjustment of the dial. This is the position in which the fifth point on the dial registers with the index 6, and in which the slot I in the dial sleeve registers with the slot 8 in theinner sleeve. Such registration of the. slots is of. course necessary to permit the actuation of the detent 21 by the key 26. To insert the key 26, the slot I9 in the key post (Fig. 16) must be registered with the notch 8 in the front end flange of the inner sleeve, as previously explained. The parts being in this position, then when the key 26 is actuated and manipulated to cause the projection 26' to engage and push back the detent 21;another projection 26 on said key will engage a notch 5 in the dial knob, so that the operator by means of the key may hold the dial knob stationary and in fixed relation to the inner sleeve While the dial member 4 is beingadjusted. It will be understood that the dial member may be adjusted five or'ten points or any multiple of five points, by rotation either to the right or left, so as to make a corresponding change in the combination required to be worked by the dial for adjusting the permutation disks to the relation ship for allowing the unlocking of the lock bolt.

.-In addition to the features hereinbefore described, attention is also called to the following features embodied in lock A.

V This lock is exceedingly compact. Its conipactness is obtained in part by reducing the thickness of the shank of the lock bolt II) as compared with'the head of said lock bolt and in part by arranging the index finger II to the left of the thinner drawer panel than would be possible without this embossing of the back plate. Another purpose of the embossing of the back plate is to make this look so it will interchange and fit the same sized mortise used with certain ordinary drawer locks. i

Another feature to which attention may be called is that the key cylinder or inner sleeve 8 plate I25.

is unitarywith. and, extends forwardly-from the frame plate- 9 which has three feet! bearing against the back plate, (Figs. 3, 19 and 20) whereby the key cylinder is properly centered and all the parts are held in their proper relations. Also the-frame plateilspaced from the back. plate I byxthe legs 9% insure freeing the tumblers I6, II,

I8 from. any pressures-In other words, in case of any warping or expansion action of the permutation disks, such action will not be permitted to bind the lock tumblers.

LockB 3 Referring .to Figs. 23 to. 41, lock B,being basicly similar to the other, maybe briefly described as follows: v j l v The lockhousing comprises the flanged back plate WI and front housing member I02 attached thereto by suitable screws I03; I In the housing isthe slidable lock bolt III] the head of which protrudes through a slot therefor in the back plate flange. This lock bolt shown inFig. ,30 has the studs I II and I I2. The index finger I I3 shown in Figs. 29 and 31 is piv- Oted on the stud III- and is pressed inwardly by the spring I I I. The indexfinger has the hook or lug II5 to engage the notches of the permuta: tion disks. a Immediatelyin front of the lock bolt II {I is the floating member II6,-having the slots II! and .I I8, thefenoe H9, and the guiding and stop projection I20. As shown'in Figs. 26 and 32, the floatingmember is formed with the recessed part IZI for coaction withthe arm of the rotatable yt; Y a 1 The stud I I I vof the lock bolt I I passes through the s1ot I I8,-of the floating member, and the index finger H3 is pivoted to the stud III at the: front side of the floating member as will beapparent from,Fig. 29. The floating-member is normallyheld from retraction bythe lock tumblers. When retracted, itis guided in itsmovements by the fixed studs I22 and. screw I 03, thescrew I03 being in the guide slot III. i 1.

The lock bolt I III is guided in itsmovements by its head slidably. fitted in the slot therefor in the back plate flange, and by its pin and slot connection I I I, I I 8 with the floating member, and by engagement of the shank of the lock bolt with one of the studs I22. i

Immediately infront of the floating member is the flxedframe plate 125 attached; to the back plate in spaced relationthereto by appropriate studs and screws This frame plate, shown in Fig.33, has the forwardly extending sleeve I26 with the slots I2'I.;

Thefronthousing member I 02 has a protruding portion I28 provided with a rigid sleeve I29 within the housing, thesleeve I 29 being concentric with the sleeve I26 extending from the frame Rotatablyfitted within the sleeve I29 and to the sleeve I 26; is the: dial sleeve I30 provided with the knurled knob I3I and figured dial member I32 adapted to beread with reference to a fixed index point I33 on the housing member.

.The dial sleeve has affixed on its inner end the first disk I35 of a set of permutation disks similar to those already described with reference tolock A. These permutation disks are respectively designated I35, I36 and I31. The disks: I36 and I3! are rotatably mounted on the sleeve I26. Said disks I 36 and I3! are respectively equipped with adjustable abutment rings? I36 and I3'I of the character already described. One of such disks and its" abutment ring are shown in Figs. 37 and 35.

The permutation disks are spaced by washers I38 and I39. Preferably these washers or at least one of them are formed as shown in Figs. 29 and 34 to provide the ward I39 In slipping such washers over the sleeve I26, the ward I30 is permitted to pass within the sleeve by virtue of its slots I21. The purpose of the ward is to prevent picking the key-controlled lock mechanism. The spacing washers may however be of the form shown in Fig. 36.

The rotatable key post I40 has the head I4 I and the arm I42. This post is longitudinally slotted to receive the key I43 shown in Fig. 28.

Tumblers controlled by the key are shown at I50, I 5I and I52. Thesetumblers cooperate with the fence H9 of the floating member II6 toprevent retraction in the manner already explained in connection with look A. Y

The individual tumblers are shown in Figs. 39, 40 and 41. Springs for holding the tumblers I50 and I5I in their normal positions are indicated at In this instance, only the tumbler I50 obstructs the movement of the floating member. It may be termed a change key tumbler. The next tumbler I5I is a sub-master key tumbler, having a projection I5I overlying the tumbler I50, so that by rocking the tumbler I5I to the right the tumbler I50 will be adjusted to allow a free passage of the fence I I0 into its gateway. The thirdtumbler I52 is a grand master key tumbler, the projection I52 of which overlies the two other tumblers, so that by rocking the tumbler I52 the tumbler I50 will be adjusted to: the unlocking position.

The operation is as follows: The lock bolt is locked both by the permutation means and by the key-controlled means, as in the case of the look A first described. It may be unlocked and re tracted and again protracted and locked by dial manipulation in substantially the manner already described, except that in this case the initial dial 1 mutation disks to a relation in which their peripheral notches register, in position to be engaged by the lug or hook II5 of the index finger II3 as shown Fig. 29. Then, as the clockwise rotation of the dial knob is continued, thelock bolt H0 is drawn back or down by the index finger. In this operation the index finger moves inside the guide and stop projection I20 of the floating member. Tothrow out the lock bolt,'the dial knob is turned reversely or counterclockwise and when the notches of the disks move past the projection I20 the camming action of the bevel I of the notch of the first permutation disk I35 will throw out the index finger. Thus the lock is restored to the combination-locked condition.

For unlocking by key operation, the proper key is inserted to adjust the tumblers so as to allow the fence I I0 of the floating member to enter the gateways of the tumblers. It will be understood that as the key is turned it turns the key post I so that the key post arm I42 coacting with the floating member H6 at the recessed part I2I,

as shown in Fig. 26, will draw back the fioating member and with it retract the lock bolt IIO. In this movement, the index finger H3 is carried with the lock-bolt H0 and floating meniber I I6, said finger confronting or bearing against the projection l 20. When the key is turned in the reverse direction, it returns the floating member to its normal position, and in this motion the projection I20 will, through the index finger, push out the lock bolt to its protracted or locked position.

It will be understood that with the tumblers shown in Figs. 39 to ii, the lock could be operated by either a special key for the particular lock, or by a grand master key controlling the tumbler I52, or by a sub-master key controlling the tumbler I5I the sub-master key being adapted for operating only as many as have identical tumblers I5i, for instance the locks for a certain division of a school, and the special key being adapted only for an individual lock, it being assumed that the tumbler I will be different for every individual lock.

In this instance the key I43 shown in Fig. 28 is a grand master key. When inserted in the key post and pushed all the way in, and when the key is turned in adirection to operate the floating member, the bit I23 of the key will actuate the grand master key tumbler I52. The notch Hi3 enables the key to clear the ward I39.

To permit changing the lock combination, the dial member I32 has notched engagement with a radially displaceable pin or detent I55 upheld by the leaf spring I55. square block radially slidable in a slot in the dial sleeve. In a commercial lock the pin I55 is quite small and would not ordinarily be observable. Apparently it is an integral part of the dial knob. "The head I I! of the rotatable key post has a recess I51. The key post may be. turned toregister the recess I51 with the pin I55. Then by means of the point of a penknife the pin I155 can be depressed into the recess I5'I,and the dial can be independently turned five points or any multiple of five points to engage another notch of the dial with the pin I55. This changes the relationship of the dial to the dial knob and consequently the relationship of the dial to the first permutation disk, accordingly changing the combination required to be worked for unlocking the lock. The lock must be in the unlocked position in order to permit the change in the combination.

The spring I50 in Figs. 29 and 26 bears against the lock bolt I I0 and is adapted to engage a notch I6I in the floating member to hold the same steady. When the floating member is retracted, the spring engages the other notch I 52. In the protracted position of the lock bolt I I0, the spring I160 also engages its notch I63, and when the lock bolt is retracted the spring engages its notch I64.

Obviously the invention is not limited to the specific embodiments shown. Moreover it is not indispensable that all of the features of the invention be used conjointly, since various features may be advantageously used in various combinations and subcombinations.

I claim:

1. A combination lock having a rotatable dial knob, a rotatable key post concentric with said knob, permutation disks operable by the dial knob, a lock bolt, a member operable by the key post for operating said lock bolt, and means cooperable with the disks for operating the lock bolt by the dial knob, said means comprising an index element pivotally connected to the lock bolt and normally held by said disks in cooperative engagement with an abutment on said member to establish an operative connection between said The pin 'or detent I55 is a member'and'lock bolt but displaceable from such engagement to disestablish such connection when the disks are manipulated to establish condition for operating the lock bolt by the dial knob.

2. A combination'lock havinga dial-operable lock bolt, dial-operable permutation means controlling the'dial operation of said 'lockbolt, a key-operable memberlfor operating saidlock bolt independently of the dial operation, said lock bolt and member, movable as one piece 'in the opera-:- tion of the lock bolt by the key,and means controlled by said permutation means for establishing an operative connection for dial operation upon a predetermined settingof the permutation means and for establishing an operative connection for key operation when's'uch predetermined setting of the permutation means is disestablis'hed.

3. A combinationlock havinga'rotatable dial knob, permutation disks manipulatable thereby to a predeterminedrelationship, a lock bolt operable by the'dial knob when such relationship is established; a rotatable key post, afloatingmember operable directly by said'key post, saidmemberfibeing 'directly'connected with the lock bolt in a manner to render the lock bolt retractible bysaid member-and independently retractible, tumbler means normally preventing retraction of said member and operable to permit such retraction when the key post is rotated by a proper key therefor and means controlled "by, said permutation disks rendering said lock bolt operable by the dial knob when apredeterminedrelation of the permutation disks is established and establishing a connection for protracting the lock bolt by said member whensuch predetermined relationship is disestablished. it it 4. A look having alock bolt, a floating mem her, said lock bolt and floating member being adjacent and having identical motions, there being a connection between said lock bolt and floating member for retracting said lock bolt by retraction of said floating member andfor permitting independent operation of the lock bolt, a rotatable operating member, notched permu- V tation disks operable one by another, one of said disks being connected to said rotatable member, said lock bolt having an index finger engageable with the notches of said disks when registered therewith, whereby said lock bolt can be operated by said rotatable member through the permutation disks and index finger, key-operable means for operating said floating member, said look bolts and floating member and index finger being movable as one piece in the retraction of the lock bolt by the floating member, and said floating member having means cooperable with said index finger whereby to protract the lock bolt by the protracting movement of the floating member.

5. A look having associated protractible members one operable by the other and also independently operable, one of said members being a lock bolt, a rotatable tubular operating member, notched permutation disks operable one by another, one of said disksibeing connected to said rotatable member, one of said protractible members having an index finger engageable with the disk notches when registeredtherewith, whereby the member having such index finger can be operated by said rotatable member through the permutation disks and index finger, a rotatable key post enclosed by said rotatable tubular member for operating the other protractible member, and means onsaid other protractible member with which said index finger when disengaged from said disk notches cooperates for establishing operative connection between said protractible members.

6. A look of the character described in claim 5 in which the index finger is pivoted to the protractible member carrying it and has a lug or hook to engage the disk notches, and the otherprotractible member has a projection cooperable with said index finger as a thrust abutment in the operation of one protractible member by the other and serving as a guide post which the index finger'moves past when the protractible member carrying such index finger is independently operated. i

7. A combination lock having a lock bolt, an index finger pivotedthereto, dial operated means including notched permutation disks manipulatable to register their notches for engagement by saidfinger whereby said lock bolt can be operated through said disks and finger. a floating key-operable member, and a rotatable key post concentric with said dial operating means to receiveithe key for operating said floating member, there being a direct connection betweensaid lock'bolt and member for retracting the lock bolt out by the unnotched peripheries of the disks,

whereby the lock bolt can beprotracted by protraction of the floating member.

8. A look having a lockbolt, a floating member, there being adireot connection therebetween for retracting said lockv bolt by retraction of said floating member and for permitting independent operation of the lock bolt, a rotatable operating member, notched permutation disks operable one by another, one of saididisks being connected to said rotatable member, said lock bolt having an index finger engageable with the notches of said disks when registered therewith, whereby said lock bolt can be operated by said rotatable member through the permutation disks and index finger, key-operable means for actuating said floating member, tumblers cooperating directly with said floating member to secure it in fixed position, said tumblers being operable to permit actuation of the floating member when the keyoperable means is operated by a proper key, and said floating member having means cooperable with said index finger whereby to protract the lock bolt by the protracting movement of the floating member.

9. In a combination lock, the combination with encased mechanism including permutation disks and a dial sleeve having one of said disks attached thereto, of a dial member on said sleeve rotatable therewith, said dial member having notches, said dial sleeve having a longitudinal slot, a spring-pressed detent working in said slot and engaging one of said notches, an inner sleeve having a slot registered with the slot in said dial sleeve, and a slotted key post rotatably mounted in the inner sleeve, the construction permitting disengagement of the detent from said notch by means of a tool inserted through the key post and engaging said detent through said slots, whereby the dial member can be adjusted to permit a different notch to beengaged.

10. A combined combination and key lock having a plurality of disk tumblers operable one by another, a rotatable operating member for one of said tumblers, a lock bolt, a key-operable mem-v ber associated with said lock bolt as a carrier therefor, said lock bolt and associated member having identical motions and having directly coacting means whereby the said member when re tracted retracts the lock bolt therewith, said means permitting independent retraction of the lock bolt, and an element connected to the lock bolt and normally held by said disk tumblers in engagement with an abutment on said key-actuated member, whereby said member when protracted protracts the lock bolt therewith, said disks adapted when brought to a predetermined relationship to release said element from said key-actuated member and said element when so released establishing an operative connection between the lcck bolt and rotatable operating member whereby the lock bolt can be retracted and protracted by said rotatable member.

11. A look having a key-actuated member, tumbler means requiring insertion of a proper key to actuate said member and coacting with said member to lock it in protracted position when the key having actuated it to such position is withdrawn, a lock bolt directly engageable with and retractible by said member and also independently retractible, an element connected to the'lock bolt and normally engaged by said member for imparting protractive movement of said member directly to the lock bolt, disk tumblers operable one by another and normally holding said'element in engagement with said member, and a rotatable operating member connected with one of said disk tumblers, said disk tumblers having notches adapted when brought into registry to be engaged by said element, thereby freeing the lock bolt from said key-actuated member and operatively connecting it with said rotatable operating member so as to be retracted and protracted thereby.

12; A look having parallel members movable as one piece in a right line to locking and unlocking position, a rotatable operating member, disk tumblers controlled thereby, means controlled by said tumblers for establishing operative connection between said rotatable member and one of said parallel members whereby to move the latter to and from locking position, key-controlled means for operating the other of said parallel members, one of said parallel members adapted to operate the other and said other being independently operable, the said means which is controlled by the tumblers functioning as an operative connection between said parallel members when one is operated by the other, one of said parallel members being a lock bolt.

,13. A combined combination and key lock having a plurality of disk tumblers operable one by another, a rotatable operating member for one of said tumblers, a lock bolt, a key operable member associated with said lock bolt, there being provision for insertion of the operating key coaxially with said rotatable operating member, said lock bolt and key operable member having directly coacting means whereby said member when retracted retracts the lock bolt therewith, said means permitting independent retraction of the lock bolt, and an element connected to the lock bolt and normally held by said disk tumblers in engagement with an abutment on said key-actuated member, whereby said member when protracted protracts the lock bolt therewith, said disks adapted when brought to a predetermined relationship to release said element from said key-actuated member and said element when so released establishing an operative connection between the lock bolt and rotatable operating member whereby the lock bolt can be retracted and protracted by said rotatable member.

EDWIN W. NORTH.

CERTIFICATE OF CORRECTION.

Patent No. 2,002,453. May 21, 1935.

EDWIN W. NORTH.

it is hereby certified that error appears in the printed specification of the abeve numbered patent requiring correction as follows: Page 7, first column, line it, claim 2, before "and" insert the words a key post, said member directly operable by said hey post and said leek bolt directly operable by said member,; and line 53, claim 4, for "bolts" read bolt; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day of July, A. l). 1935.

Bryan M. Battey (Seal) Acting Commissioner of Patents. 

